Carbureter.



W. OTTAWAY.

CARBURETER.

APPLICATION FI-LED JAW.31.1913. l LPW Patented Apr. 13, 19ML aSHEETS-SHEET 1.

W. OTT/mmv.`

CARBURETER.

APPLICATION FILED 1m31. 1913.

Patented Apr. 13,

W. OTTAWAY.

CARBURETER.

APPLicATloN FILED MN. a1. l1913.

Lm meme@ Apr. 13, 1915.

3 SHEETS-BHBBT 3.

X7-Z Weiz .manen emmene iurrniinr WILLIAM OTTAWAY, OF AURORA, ILLINOIS,ASSIGNOR T0 AURORA AUTOMATIC, MACHINERY COMPANY, 0F CHICAGO, ILLNOS, .ACORPORATION OF ILLINOIS.

CARBURETER.

rasante.

Specification of Letters Fatent.

Patented Apr. 113, 19115.

Application filed January 31, 1913. Serial No. 745,318.

To ZZ 'whom 'it may concern:

Be it known that l, ViiLLiAivi O'r'i'AwAY, a citizen of the UnitedStates, and a resident ot Aurora, in the count-y ot Kane and State ofIllinois, have invented certain new and useful improvements inCarbureters; and I' do hereby declare that the following is a full,clear, and eXact description thereot, reference being had to theaccompanying drawings, and to the letters of reference marked thereon,which form a part of this specification.

This invention relates to that class of carbureters which are adapted tobe used in connection with internal combustion engines or motors, andmore especially to the` means for controlling and regulating theproportion of. air and combustible tluid or hydrocarbons to beintermixed.

The principitl object oic the invention is to provide a simple,economical and citicienl carbureter.

Other and further objects of the inveiition will appear from anexamination of the following description 4and claims and from an.inspection of the accompanying drawings..

A earbureter of the construction herein shown and described is adaptedto enable the admission of highespeed air and lowspeed air to becontrolled by separately adjustable means, and to enable the proportionof air and hydrocarbons under highspeed and low-speed conditions,respectively, to be controlled and regulated by controlling andregulating the air supply by such separately ad]ustable means.

The invention consists in the features,

combinations, and details of construction herein described 'and claimed.

In' the accompanying drawings,Figure 1 is a view in central verticalsection of a carbureter constructed in accordance with my improvements,the portion through the parts shown in Fig. 2 being taken on irregularline 1 of Fig. Qand the remaining portion being taken through the centerof the device, as indicated by sectional line 3 of Fig. 3; Fig. 2, ahorizontal sectional view,

vtaken on line 2 of Fig. l; Fig. 3, a horizontal sectional view, takenon line 3 of Fig. l; Fig. 4, a horizontal sectional view,

taken on line 4 of Fig. 1; Fig. 5, a detail view in central verticalsection through the lcenter ot the rotative valve mechanism. and

'butterfly valve shown in Figs. 1 and 5,

showing the throttle valve bushing or casing in section; and Fig. 7, anenlarged detailview of the portion of the feed tube or nozzle shown inFig. l.

1n constructing a carbureter in accordance with my improvements, lprovide a casing a having an inner tubular portion or inner casing walls5 encircled by the outer casing or walls and forming therewith anannular float chamber c in which is located an annular Heat d. The floatis, by preference, in the form of a hollow, annular shell whichencircles the inner casing portion Z9, andis encircled Aby the outercasing a and adapted to move freely upward and downl` ward within thecasing or float chamber. An annular bottom easing member or portion e,which is, by preference, made in one integral. piece with the outercasing portion or walls (t, forms the main bottom ot the casing andfloat chamber and is provided with an upwardly extending, screw-threadedflange f in screw-threaded engagement with the screw-threaded bottom endof the inner casing member or tube 5, as shown in Fig. l. A cover g ofannular construc tion encircles the upper portion of the inner casing ortube member b and is secured thereto and to the outer casing member a inany desired suitable manner. The upper portion i ot the inner casing ortube l) projects through and upward beyond the cover member g andisprovided with outer screw threads as indicated "in Fig. 1. An uppercasing or neck member i of tubular construction and having an elbowportion 7' is connected with the main casing, and forms an outletpassage leading from the mixingv vchamber or space. rThis casing membert' has inner screw threads at its lower end in threaded engagement withthe upwardly projecting portion h of the inner casing member or tube 5,and is provided with means for operatively connecting the carburetorwith the fuel supply ,pipe of an engine or' motor, which connecttto titi

tilt.'

der. A feed tube n forming a combustible fluid or hydrocarbon supplypassage o, 1s mounted in position to extend upwardly on the inside ofthe inner casing member or tube l) and is supported by means of asupporting member or tube body portion p having radial arms g which aresecuredto the casing bottom e by means of screws r or other similarsecuring means, and a oasing bottom member or sub-bottom s havmg sidewall portions t is mounted beneath the annular casing bottom member eand provided'v with a central aperture through which the lower end ofthe feed tube may project. The lower projecting end ui of the feed tubeis provided with inner and outer screw threads, and a nuto is mounted inthreaded engagement with the outer screw threads of this downwardlyprojecting end ,portion of the feed" tube and in supporting engagementwith the bottom member s so as to securely hold the tube and said bottommember in position and in rigid engagement with each other.

A plug fw is mounted in ,threaded engagement with the bottom end of thetube and forms a closure for the same. The bottom member s with its sidewalls forms an air reservoir passage or space y, and is provided withone or more air supply passages e' communicating with said space. Asuitable screen 2 oi reticulated material or wire netting is mounted onthe interior of the passage, reservoir, or compartment y in position toadmit air to and exclude dust, sand, grit, and other foreign substancesfrom the interior of the carbureter or mixing chamber. A hollow tubularportion 3 is provided in one side of the easing having a passage flthrough the inner wall l thereof which communicates with the interior ofthe float chamber c, as shown in Fig. 1. The upper end of this vertical,tubular portion is closed by means of a plug 5. To the lower ,end of thetubular portion 3 is secured a coupler member or valve casing 6, theupper end of which is in threaded engagement with thetubular member 3,and the lower portion of which is provided with screw threads andadapted to be secured in threaded engagement with a suitable couplcrmember or' supply pipe connected with a source of hydrocarbon orcombustible Huid supply. or valve casing (3 has a central, axial openingor passage S leading therethrough, and mounted in this passage is amovable valve member or valve plunger 9 having a conical lower-endportion 10 movable into and out of engagement with a similar conicalvalve'seat portion llissaid valve scat portion being immediatelyl abovea restricted portion 12pt' the passage 8.\ A valve-operating le've'r 13is pivotally mounted upon a zsuitablle, supporting member or bracket 14The coupler member by means of a horizontal pivot 15, and is providedwith. forked lever arms 16 located on the inside ol the float chamberand extending on opposite sides of the inner casing member or tube t',cach of said arms having their forked end portions in engagement withthe bottom of the float d. The supporting bracket 14 which supports thevalve-operating lever 13 is secured in position by means of a screw 17and aint 18, as shown in Fig. 1, or byany desired suitable securingmeans, and the lever 13 is provided with an opening 19 through the endportion of said lever, which is located in the interior otl the tube 3and through which perforation the valve body 9 extends. The lever 13 isthus adapted to be operated by the Vfloat d, and to operate thevertically movable valve body or valve member 9, as the liquid admittedto the float chamber causes the float to rise or descend. The valve bodyis provided with one or more longitudinal passages 20 therein which areadapted to be opened when the-valve body is raised and to `be closedwhen the valve body is lowered or in engagement with the valve seat. Connected with the upper end of the valve body and vertically movable inthe tube 3 is a cylindrical member 21 which is adapted to form acounter-weight for ho] ding the valve member 9 removably.' in engagementwith the valve sea-t, and adapted to permit the valve to be raised bymeans of the float al and valve-operating lever/when the hydrocarbon orcombustible ,fluid becomes suiii ciently ylow in the float the float toso operate the lever 13 as to raise the valve and the counter-weight Q1.The lower end oi this cylindrical member Q1 is provided with a vertical,axial perforation into which the valve member 9 cxtends, and is thusadapted to be adjustably secured in threaded engagement with the valvemember 9, and when so secured it is adapted to enable the valve memberi) to be adjusted up or down. uit with needle valve member 9 withoutthreads and merely ,pressed into weight 21, the bending ot' lever13Iwill enable the proper seating of the valve to beobtained and theheight of gasolenein the float chamber to be varied. The lioat chamberis provided with an outlet opening 22 which is covered by a. screen 28.-lhis opening communicates with the inncr lpassage 0 in the feed tube n,by way of a passage 24 formed by a tube 25, one end ol which isconnected with.. the feed tube 'n and the other end of whichhisconnected with the bottom of the casing and float chamber outlet Q2 bymeans oi a coupler member or screened cap and pipe-connecting member 26,The screen-supporting ca p QG and pipe 25 thus form a passage leadingfrom the float chamber to the interior of the feed tubf` n. The feedtube-n is prochamber to permit llt;

rasante vided at its upper end with a plug Q7 having a conical headwhich fits in a conical seat in the upper end y,of the tube, the conicalhea-d et the plug being provided with. a plurality of peripheral groovesforming passages 28 which communicates with the interior of the feedtube and with the car bureting chamber or space above the feed tubehereinafter more particularly de* scribed. The plug 27 is provided witha screw threaded portion 29 which is in threaded engagement with thefeed tube. The plug has Van axial opening 30 therein and is providedwith a non-threaded re stricted peripheral portionBl which is of lessdiameter than the portion of the tube n which encircles the same, thusforming an. annular space 3Q between said non-threaded portion of theplug and the inner wall of the tube. The space 32 is connected andcommunicates with the axial opening 30 by .means of passages 33,- asshown in Fig. 7,

and communicates with 'the mixing chamber or interior space above theplug or nozzle through the passages 28, as shown in Fig. l.

A throttle valve, which is, by preference, in the form of a butterflyvalve 34, is rockingly mounted in the upper portion z' of the casingupon a horizontal rock-shaft 35 which is journaled or rotatablysupported in the vcasing and provided at its outer end with an operatinglever arm or crank 36 (see Figs. l, 5 and 5). This throttle valve isadapted to be automatically operated or turned to opened or closed orany desired intermediate position to correspond with the speed ofoperation of the motor or engine in any desired, Ordinar or known mannerand by means of operating mechanism of any desired type known to thoseskilled in the. art.

A The throttle valve shown in the drawing is provided with a restrictedopening oropenings 37 which may be of any desired form, adapted topermit the passage of combustirble fluid from the mixing chamber orspace 38 to the motor.v or engine when the latter is running at lowspeed with the throttle valve in closed position.

An upwardly and downwardly tapered air-receiving tube 39 having an upperend portion 40 of less diameter 'than the lower I portion encircules thel,feed tube a and forms a tapered, annular air passage -fl-l whichcommunicates with the air-containing space 4:52

' ybelow the carbureting chamber or space RS,

and forms a conduit the upper end of which is, by preference, slightlybelow the level of the top of the nozzle and adapted to conduct acurrent of air upwardron all sides ot' and adjacent to the nozzle insuch a manner that the airis caused to flow upward past the nozzle andbecome thoroughly intermixed with the liquid hydrocarbon passingr fromthe nozzle in the saine general upwarddirection. An inner tubular valvemember i or bushing 4K3 extends upward from a point preferably slightlybelow the top oit the. 'nozzle in position to encirc e the nozzle, andhas its upper end portionllt in bearing engagement with the neck orcasing portion This cylindrical or vtubular bushing member is of lessdiameter than the stationary inner tube or casing member and forms anair space between said rotative bushing member and said tube b. Thetubular member 43 is provided atits lower end with radially projectingprongs or supporting and guiding lugs t6shown in Figs. l and 3-which areadapted to guide and supportthe lhwer end of the Atubular member 43rotatively inupright position in concentric relation tothe casingportion c' and the feed tube a. The cylindrical.y rotatively mountedvalve member or bushing d3 is provided with :l series of air-inletopenings 4-7 (see Fig. 3) which are adapted to be'moved into and out etposition to register with the corresponding openings t8 in an innercylindrical, rotative and endwise m'ovable cylindrical valve member -19hereinafter more particularly described. 'lhe member or bushing 43 isprovided with an operating stem 50, the inner end 5l ot which vis inscrewthrezuled engagement with said rotative valve member or bushing.This stem is for rotating the valve member 43 for controlling theadmission of high-speed air and extends through a radial, segmental.slot 52, shown in Figs. l and 2 of the drawings, which is adapted topermit the movement ol the operating stem in a horizontal plane in theoperation of rotating the cylindrical valve member or bushing` 43 withrespect to the inner, tubular, cylindrical. valve meniber 49, :tor thepurpose of increasing or de creasing, or controlling and regulating thesize or effectual area ot the openings fl8- which communicate with theairspace 45 on the outside ot the tubular members 43 and 49 and with themixing chamber or inner .air spaces on the inside olc said tubularmembers. Seginental, curved guides 53 and 5i formed ot 'flexiblematerial and the inner one ot which has a curved inner surface adaptedto slidably engage the outer cylindrical surface olf' the casing memberi, extend across the opening 52 in the casing member t', and are securedto and movable with 'the stem so as to keep the openingl constantlyclosed during the movement'of the operating stem or when the stem is inany desired posi- ,tion to which it is adapted to be adjusted. A nut orstop block 55, shown in Fig. 2. is adapted to stop the operating stem 50at tlle opposite extremities of its movement,

respectively. by

The inner, rotative and endwise movable `valve member or sleeve 49; isprovided with a downwardly and inwardly tapered cone shaped lowerportion 56,'the inclined wall portions of which have openings 57therebetween, as shown in Fig. 3. These openings are, by preference,normally slightly below the top of the nozzle 27 and intermediate thelower end of the rotative cylindrical valve member or bushing 43 and theend of the nozzle, anda cylindrical washer 58 having a radial, annularflange 59 is mounted at the bottom end of the conical inner'tubulaivalve member 49 below, the openings 57 and, by preference,secured to and movable upward and downward with the tubular valve member49 so as to decrease thersize of the opening 60 between the flange 59and the lower end of the cylindrical valve member or bushing 43, whenthe inner valve member 49 is raised,`and increase the size of saidopening, when the valve member 49 is lowered.` The washer 58 may bemounted in fixed engagement with and in position to encircle thetapered, tubular member 39, above described, and the tapered,

tubular member 39 is, by preference, secured to and movable upward andddwnward with and supported by the conical inner cylindrical valvemember 49. The cylindrical valve member 49 is, in turn, supported vby aconnecting rod or plunger 61 the loWer end of which is pivotallyconnected with said cylindrical valve member 49 by means of a horizontalpivot or shaft 62 (see Figs. 1, 2 and 5), and theiupper end of which isoperatively connected with the throttle valve by means of lugs 63 whichare secured to the valve 34 and a horizontal pivot 64 mounted in saidlugs and in pivotal supporting engagement with the plunger or connectingrod .61 which is provided/with perfor-ations in its upper end throughwhich said pivot extends.

.lt is desirable to provide means for regulating and controlling theadmission of lowspeed air or air for use when the apparatus is beingoperated under low-speed conditions adapted to be adjusted.independently of the means for regulatingthe high-speed air. In orderto accomplish this the cylindrical valve member'or bushing 43 isprovided with a radial opening 65 and the inner, tubular, cylindricalvalve member 49 is provided with a corresponding opening 66, best shownin Figs. 1 and 2, which are adapted to register when the throttle valveis closed and the innerl cylindrical valve member 49` in its raised oruppermost position, and to be closed when the throttle valve is open andthe inner, tubular member 49 in 'its lowermost position. The casingportion i is provided with an air-inlet opening 67 and a rotative valve68 is mounted in the opening or passage 67 and'adapted to open and closethe same and to regulate the volume of air admitted therethrough. Thisvalve 68 is provided with a thumb nut 69 (see Figs. 1 and 2) by means ofwhich it is adapted to be operated, yand is shown in closed position inFigs. 1 and 2, the peripheral bodyportion of the valve being in positionto 'extend across` the opening 67 and the passage 70 in the valve beingclosed. An inner sleeve or bushing 71 is mounted in the bottom portionof the tubular member 49, for restricting the size of the passage anddeflecting the air inward toward the nozzle.

From the foregoing description it will be seen that the passage 41 inthe tapered sleeve 39 is at all times adapted to admit air to thecarbureting chamber, and that the opening 60 between the Hange 59 andthe bottom of the cylindrical valve member or bushing 43 is wide openand adapted to co-act with the openings formed by the' ports47 and 48when the throttle valve 34 is in open position, under which conditionsthe opening through ports 47 and 48 and 'the opening 60 are adapted toadmit air in suitable quantities for high-speed conditions and thecarbureter is adapted to supply a mixture of air and hydro-carbons to amotor operating at high-speed.

In operation the cylindrical bushing or valve member 43 is rotated toany desired adjusted position by means of the stem 5() for the purposeof adjusting or increasing or diminishing the width of the openingsformed by the ports 47 and 48, thereby regulating the proportion of airand vapor or hydro-carbons admitted for or during the operation of thedevice under high-speed conditions. The proportion of air and vapor orhydro-carbons entering the mixing chamber under low-speed conditions isregulated and controlled by the adjustment of the valve 68 to increaseor diminish the area of the opening 67, as already described. The valve68 and the rotative valve casing or bushing member 43 are thusseparately adjustable for the purpose of controlling and regulating theproportion of air and vapor or hydro-carbone; admitted under high-speedand low-speed conditions, respectively.

Assuming the ports 47 and 48 for regulating the admission of auxiliaryair for high-speed and the ports 65 and 66 for regulating the proportionof air and vapor for low-speed conditions to have been adjusted so thatsaid ports are of the desired width, and that the throttle valve isadaptedwtobc manually opened and closed in a manner which will vary thesize of the out let in proportion to the speed of the motor, the,operation of the parts is as follows: The cylindrical valve member 49is moved endwise in the valve bushing 4,3 by the operation or partialrotation of the valve 34l as theflatteris operated, for the purpose ofcontrolling the quantity of, mixture deliv- .liercd to 'the motor.

The endvvise movement of said cylindrical valve member' causes the mainair inlet port or opening to be opened or enlarged to correspond withthe extent of the opening of the valve 34, and closed or diminished tocorrespond with the closing of the latter', thereby enabling the supplyof air passing into the mixing chamber adjacent to the nozzle to bevaried to correspond with the quantity of mixture delivered to theengine. `The endvvise movement of the inner cylindrical valve member 49in one direction-for instance downward in a device constructed hereinshown and described--causes the auxiliary air inlet openings formed bythe ports 47 and 48 'for admitting high-speed air to be opened orenlarged, and causes the air inlet openings formed by the ports G5 and66 for admitting low-speed air to be closed or diminished. The`closingaoij` dilvninishing ot the size of the openings formed by theports G5 and (i6 begins as the ports 47 and 48 begin to be opened, andthe ports (35 and 6G are entirely closed when the ports 47 and 48 forhighspeed are entirely opened. vlt follows, as av matter of course, thatthe endwise movement of the inner cylindrical valve member 49 in theopposite direction Will occur with the movement et the valve 34 toor inthe direction of closed position, thus caus` ing the main air supplyopening or port 60 at the bottom ot the cylindrical or tubular valvemembers 43 and 49 to be diminished or closed in proportion to the extentof movement of the valve 34 to or in the direction of closed position.The annular space 45 between the rotative tubular valve member 43 andthe inner annular wall b of the casing may be said -to form an auxiliaryair inlet passage for high-speed air, said passage being adapted tocommunicate with the interior of the mixing chamber when the coactingports 4T and 48 in the rotative tubular valve member 453 and endwiscmovable, tubular valve member 49 are open. The effectual area of theauxiliary air inlet passage formed by the space 45 and the coacting`ports 47 and 48 is therefore varied, or increased and diminished for thepurpose of regulating the proportion of hydro-carbons and high-speed airby the circumferential adjustment or rotation of the rotative 'alvemember 43 with respect'to the endwise movable, tubular valve member' 49,as above suggested. The endvvise movement of the inner cylindrical ortubular valve member 49 upward or in a direction tending to close theports 47 and 48 and the main air inlet port 60 causes the inlet openingformed by the ports and (SG to be opened or increased 't'or admittingauxiliary low-speedy air. When the opening G0 and the ports 47 and 48have thus been entirely closed, the ports (35 and 66 for low-speed airWill be entirely open and the tapered annular passage 41 will also stillbe open so that air will be admitted through the passage 41 and adjacentto the nozzle n with sul'iicie'nt rapidity ot' movement to bethoroughly. intermixed with the combustible fluid or liquidhydro-carbons, when the'device is'in operation under low-speedconditions.

The carbureter above described is thus adapted to enable the desiredproportions of hydro-carbons and airto be admitted and thoroughlyintermixed, under varying highspeed and low-speed conditions,respectively, and to enable the proportions of air and hydro-carbonsunder both high-speedand low-speed conditions to be varied and regulatedor controlled by regulating the admission ot' air, and Without thenecessity of regulating or changing the hydro-carbon supply nozzle orpassages. The auxiliary passages 'for high-speed air 'and the auxiliarypassages for low-speed air are controlled and the proportion ofhydro-carbone and air under high-speed and low-speed conditions,respectively, are regulated by means of separately adjustable valvemembers or devices, and the operation ofthe endwise movable, tubularvalve member is` such as to control or vary the effectual area of themain air inlet passage and the auxiliary air inlet passages for bothhigh-speed air and low-speed air, with such sepa ately adjustable valvemembers in any position to Which they are adapted to be adjusted.

It will be readily understood by those skilled in the art that althoughthe downward movement of the inner cylindrical valve member opens theauxiliary highspeed air inlet jiassages and main air supply passagesleading to the mixing chamber and closes the low-speed auxiliary airpassage, the positions and relations of the coactingl auxiliary portsfor .low-speed and high-speed air, respectively, may readily bereversed, so that the downward movement of the endwise movable, tubularvalve member will act to close the passages for highspeed air and openthe ports or passages for low-speed air Without departing from thespirit of this invention.

llt is manifest that the details of construction in an'apparatuscontaining the general features herein set torthmav be variouslymodified in practice without departing from the spirit of my invention,and I dov not, therefore, desire to be limited to the particularfeatures and details of construction illustrated ory described, exceptin so far as the same may be pointed out in the appended. claims.

l claim:

1. ln a carbureter, the combination ot' a casing provided with a mixingchamber having main air-inlet and mixture-outlet open-.

ings and provided with auxiliary inlet passages adapted to communicatewith the mixing chamber, independently adjustable valve members for eachof said auxiliary inlet passages acting to control the eli'ective areasof said auxiliary air-inlet passages, a reciprocating valve memberadapted to simultaneously open one and close the other of said auxiliaryinlet passages, with said separately adjustable valve members in anydesired adjusted position, a movable valve member in engagementwith themixtureoutlet port, and an operating lever operatively connected withthe valve member for the mixture-outlet port and withl saidreciprocating valve member.

, 2. In a carbureter, the `combination o1 a casing provided With a.mixing chamber having main 'air-inlet and mixture-outlet openings andprovided with an auxiliary inlet passage for high-speed air and aseparate auxiliary inlet passage for low-speed air, each of saidauxiliary inlet passages being adapted to'communicate with the mixingchamber, anda 'reciprocating valve member adapted to simultaneously openone and close the other of said auxiliary air passages.

3. In a' carbureter, the combination of a casing provided with a mixingchamber having main air-inlet and mixture-outlet openings and providedwith independent auxiliary air inlet passages adapted to communicatewith the mixing chamber, independently adjustable valve members mountedin the casing and adapted to vary the effective areas vof said auxiliaryinlet passages, a .throttle-valve mounted in said casing adapt-. ed tocontrol the discharge of the mixture from said mixing chamber, and afalve member movable with said throttle-valve and independently of saidvalve members for opening and closing said auxiliaryl air-inletpassages, and adapted to simultaneously diminish the passage of airthrough one and increase the passage o't' air through the other of saidauxiliary passages, as the discharge oi mixture through the outlet portis decreasedl or increased.

4. In a earbureter, the combination of a easing provided with a mixingchamber having main air-inlet and mixture-outlet openings and providedwith an auxiliary inlt passage for high-speedfair and a lseparatezulxiliary inlet passage for low-speed air, each of said auxiliarypassages being adapted to communicate with the mixing chamber when theother ot' said passages is closed, separately adjustable rotative valvemembers mounted in the easing, one of said rotative valve members beingadapted to vary the eli'eetual area' of the auxiliary inlet passage forhigh-speed air, and the other ot' said rotative valve members beingmounted in position to vary the effectual area ot' the auxiliary inletpassage for low-speed air, an endwise movable tubular valve membermounted in sliding engagement with one of Said rotative valve members,and means for reciprocating said endwisc movable valve inlet passage forlow-speed ai' adapted to communicate with the mixing chamber, a.rotative valve member mounted in the casing in position to coact withthe auxiliary inlet passage for low-speed air for varying the effectualarea of said passage, a rotative tubular 'alve member, and an cndwisemovable tubular valve member mounted in sliding engagement with eachother and, provided with coacting auxiliary inlet ports adapted to forman auxiliary inlet opening for high-'speed air, means for adjusting therotative tubular valve member, for varying the effectual area of thepassage formed by said coacting ports for the admission of high-speedair, and means for reciprocating the endwise movable tubular valvemember, for varying the cliectual area of all of said auxiliary inletopenings.

G. In a carbureter, the combination of a casing provided with a mixingchamber having main air-inlet and mixture-outlet openings and providedwith an auxiliary inlet passage for low-speed air adapted to communicatewith thc mixing chamber, a rota` tive valve member mounted in the casingin position to eoact with the auxiliary inlet passage for low-speed airfor varying the eli'ectual area ot'. said passage, a rotative tubularvalve member and an endwise mov,-n able tubular valve member mounted insliding engagement with cach other and provided with enacting auxiliaryinlet ports adapted to `form an auxiliary inlet passage for high-speedair, means foi-.adjusting the rotative tubular valve member, for varyingthe ett'eetmal area of the opening formed by lsaid coat-,ting ports forthe' admission of high-speed air, a movable outlet valve member mountedin the mixture-outlet passage, means for operatively connecting saidoutlet valve member with the endwisemovable tubular valve member, and amanually operable lever connected with the outlet valve member, t'oroperating said outlet valve member and the endwise movable tubular xalvemember.

7. ln a carbureter, the combination of a main easing, a pair of tubularvalve members mounted in the main casing in concentric relation andprovided with main airinlet and mixture-outlet openings, said valvemembers having coactipg auxiliary air-inlet 'rasante r" ports adapted tocommunicate with each other and with the space surrounded by said valvemembers, one of said tubular valve members being rotative to differentadjusted positions with respect to the other valve member, for changingthe effectual area and width in one direction of the opening formed bysaid coacting auxiliary ports, and the other of said tubularfalvemembers being movable endivise in opposite directions to differentadjusted positions to change the size of the opening formed by saidcoacting auxiliary ports in a direction lengthwise of the tubularvalvemembers.

S, ln a carbureter, the combination of a main casing, a pair of tubularvalve niembers mounted in the main casing in concenn tric relation andprovided with main air inlet and mixture-outlet openings, said valvemembers having coacting auxiliary air-inlet ports adapted to communicatewith each other and Vwith the space surrounded by said valve members,one of said tubular valve members being rotative to different adjustedpositions with respect to the other valve member, for changing theeffectual area and width in one direction oi the opening formed by saidcoacting auxiliary ports, and the other et' said tubular valve membersbeing movable endwise in opposite directions to different adjustedpositions to change the size of the opening formed by said coactingauxiliary ports in a direction lengthwise of the tubular valve members,and means for moving the endwise movable tubular valve memberlongitudinally of the rotative valve member to different adjustedpositions.

9. In a carbureter, the combination of a main casing, a pair of tubularvalve members mounted in the main casing in concentric relation and insliding engagement with each other land provided with main air-inlet andmixture-outlet openings, said valve members having lenacting auxiliaryair-inlet ports aliapted to communicate with each other' and with thespace Isurrounded by said cylindrical valve members, one of saidcylindrical valve members being, rotative to different adjustedpositions with respect to the other valve members, for changing theeffectual area of the opening formed by said coacting ports, and theother ot said tubular valve members being movable endwise in oppositedirections, to change the size ot the passage formed by said coa/:tingports in a direction lengthwise of the tubular valve members, valvemechanism for opening and closing the mixtureputlet opening, andmanually operable reciprocating n'ieehanism connected with the endwisemovable cylindrical valve member for moving the same endwise in oppositedirections. i

10. ln a carburetor, the combination of a main casing, a pair oftubularaualvemembers mounted in the main casingr in conof said tubularCentric relation and provided with main air-inlet and mixture-outletopenings, said valve members having coacting auxiliary airinlet portsforming an inlet passage "for high-speed air, adapted to communicatewith the space surrounded by said tubular valve members, one of saidtubular valve members being rotative to different adjusted positionswith respect tothe other, for changing the area of the opening formed bysaid communicating ports, and the other of said tubular valve membersbeing movable endwise in opposite directions to open and close said mainand auxiliary inlet ports, a throttle valve operatively connected Lwiththe endwise movable tubular valve member and adapted to be moved towardits open position with the movement of said endwise movable tubularvalve member toward the position which it occupies when the main airinlet is open, and means for operating thegtbrottle valve and endwisemovable tubular valve member simultanef ously, in one direction to openthe throttle valve and main air-inlet passage, and in an oppositedirection to close said main air-inlet and throttle valve, and open theauxiliary air-inlet passage for high-speed air.

ll. In a carburetor, the combination of a main casing, a pair of tubularvalve members mounted in the main easing in concentric relation andprovided with main airinlet and mixtureeoutlet openings, said valvemembers having adjacent auxiliaryv air-inlet ports adapted tocommunicate with each other and with the space surrounded by saidtubular valve members, one of said tubular valve members being rotativeto vdifferent adjusted positions With respect to the other valve member,forchanging the effectual area` and width of the opening formed by .saidcommunicating ports, and the other of said cylindrical valve membersbeing movable endwise in opposite directions to increase and diminishthe size of the opening formed by said auxiliary air-inlet ports in adirection lengthwise of the tubular valve members, a rotary throttlevalve,4 a link having one end connected with the rotary throttle valveand having its opposite end connected with the endwise movable tubularvalve member, and .means for operating the throttle valve.

12. ln a carbureter, the combination of. a main easing, a pair oftubular valve members mounted in the main casing in concentric relationand sliding engagement with respect to each other and provided With`main air-inlet and mixture-outlet openings,

said valve members having adjacent auxiliary air-inlet ports adapted 'tocommunicate with each other and with the I space sur rounded by saidtubular valve members, one valve members being rotative with respect tothe other, for changing and means for moving the endwise movable tubularvalve in opposite directions alternately simultaneously with themovement of the throttle valve toward open and closed positions,respectively.

13. In a carbureter, the combination of a main casing, a pair of hollowcylindrical valve members mounted in the main casing in concentricrelation and forming the an nulai' walls of a mixing chamber providedwith main air-inlet and mixture-outlet openings, said valve membershaving adjacent auxiliary air-inlet ports adapted to communicate witheach other andwith the space encircled by said cylindrical valvemembers, one of said cylindrical valve members being rotative withrespect to the other, for changing the area of the opening formed bysaid communicating auxiliary air-inlet ports, and the other of saidvalve members being movable endwise in opposite directions to open andclose said auxiliary ports, and means upon the endwise movablecylindrical valve member for opening and closing the main air-inletopening of the mixing chamber.

14. In a carbureter, the combination of a main casing a pair of hollowtubular valve members mounted in the main casing in concentric relationand forming adjustable annular walls of a mixing chamber having amixture-outlet opening, said tubular valve members having coactingopenings at their lower ends forming a main air-inlet pas' sage andhaving adjacent auxiliary air-inlet p ports interinediatelthemainair-inlet pas' sage and mixture-outlet passage, adapted tocommunicate vwith each other and with the space encircled by saidtubular valve mem-l bers, one of saidtubular valve members beingrotative with respect to the other, for

' changing the area of the opening formed by said communicatingauxiliary air-inlet ports,

and the other of said valve members being 15. In a carbureter, thecombination of a movable endwise in opposite directions to open andclose said auxiliary ports and main air-inlet passage,` and an annularflange upon the endwise movable tubular valve member adapted to open andclose the main air-inlet passage.

main casing, a pair of hollow tubular valve mcmblers mounted in the maincasing in concentric relation and foi-ming adjustable annular walls of amixing chamber having a mxtiire-outlet opening, said tubular valvemembers' having coacting openings at their lower ends forming a mainair-inlet passage, adapted to. communicate with each other and with thespace encircled by said tubular members being rotative with respect tothe other, for changing the area of the opening formed by saidcommunicatino auxiliary air-inlet ports, and the other o? said valvemembers being movable endwise in opposite directions to open and closesaid auxiliary ports and main air-inlet passage, a nozzle having acombustible fluid supply passage communicating with the mixing chamber,a depending tubular end portionlon the inner tubular member encirclingthe nozzle and forming4 an air-inlet passage between the nozzle and themain air-inlet passage of the mixing chamber, and an annular Harige uponsaid depending tubular portion of the inner valve member for controllingthe effectual area of the main air-inlet opening.

16. In a carbureter, the combination of a main casing, a pair of hollowtubular valve members mounted-in the main casing in concentric relationand formino` adjustable annular walls of a mixing cham er having amixture-outlet opening, said tubular valve members having coactingopenings at their lower ends forming a main air-inlet passage, adaptedto communicate with each other and with the space encircled by saidtubular valve members, one of said tubular valve members being rotativewith respect to the other, for changing the area of the opening formedby said communicating auxiliary air-inlet ports, and the other of saidvalve members being movable endwise in opposite directions to open andclose said auxiliary ports and main --air-inlet passage, a nozzle havinga combustible fluid supply passage communicating with the mixingchamber1 a depending tubular end kportion on the inner tubular memberencircling the nozzle and forming an air-inlet passage between thenozzle and the main air-inlet passage of the mixing chamber, an annularflange upon said depending tubular portion of the inner valve member forcontrolling the effectual area' of the main air-inlet opening, andmanually operable mechanism for moving the inner tubular `valve memberendwise in op- 'posite directions successively to different adjustedpositions.

17; In a carbureter, the combination of a main casing, a pair of hollowtubular valve directlons to open and close the main airinlet passage andsaid auxiliary communi.- cating ports, a throttle valve for themixtureoutlet-passage movable to open and closed positions, and manuallyoperable mechanism acting to move the endwise tubular valve membertoward the position which it occupies when the main air-inlet passage isopen, simultaneously with the movement of the throttle valve toward openposition, adapted to move said endwise movable tubular valve member inan opposite direction to close said main air-inlet passagesimultaneously with the movement of the throttle valve to closedposition.

18. In a carbureter, the combination of a main casing, a pair of tubularvalve members mounted in the main easing in concentric relation and insliding engagement with each other and forming the annular Wflls of amixing chamber provided with main air-inlet and mixture-outlet openings,said valve members havingl eoacting auxiliary air-inlet ports adapted tocommunicate With the mixing Chamber, one of said tubular valvemembersbeing rotative with respect to the other for changing the Width andciteetual area of the opening formed by said communicating auxiliaryports, and the other of said tubular valve members being movable endwisein opposite direction to open .and close the passage formed by saidcoacting auxiliary ports, a nozzle having a luid supply passagecommunicating with the mixing chamber, a throttle valve for opening andclosing 'the mixture-outlet opening, a link having one end pivotallyconnected with the endwise movable tubular valve member and having itsopposite end pivotally connected with said throttle valve, means foroperatively connecting the mixture-outlet opening with thecylinder of anengine, and manually operable means for moving the throttle valve towardand -from open and closed positions.

19. vIn a carbureter, the combination of a main casing, a pair oftubular valve members mounted in the main casing in concentric relationand in sliding engagement with each other and 'forming the annular wallsoi a mixing chamber provided with main airinlct and mixture-outletopenings, said valve members having coactin'g auxiliary air-inlet portsforming an auxiliary inlet passage for high-speed air adapted tocommunicate with the mixing chamber, and having other coaeting portsforming an auxiliary inlet passage ior low-speed air, adapted to beclosed ivhen the auxiliary passage for admitting high-speed air and themain air-inlet passage are closed, one of said tubular valve membersbeing rotative with respect to the other for changing the Width andeffectual area ofthe openings formed by said auxiliary ports, and theother oit said tubular valve members being movable endvvise in oppositedirections to open and close the passages formed by said auxiliary andmain air-inlet ports, a nozzle having a combustible Huid supply passagecommunicating with each other and forming the Walls ot a mixing chamberhaving main air-inlet and mixture-outlet openings, one of said tubularvalve members being rotative with respect to the other and having anauxiliary airinlet passage adapted to communicate with the mixingchamber, for admitting an auxiliary current of high-speed air to saidchamber, and the other of said tubular valve members being movableendwise in one direction into position to close said auxiliary air-inletpassage and in an opposite direction into position to open said port, anannular ilange upon the lower end of the endwise movable valve memberandanovable with the latter toward and from the lower open end et' therotative valve member, for opening and closing the main air-inletopening, `a throttle valve for openingl and closing the mixture-outletopening, and manually operable mechanism for moving the endwise movabletubularI valve member in one direction, to open the main air-inlet portand the auxiliary port for admitting high-speed air sin'iultaneouslyWith the movement of the throttle valve to open position, said manuallyoperable mechanism acting to move the endwise movable valve member in adirection to close the main air-inlet passage and said auxiliaryair-inlet port for admitting high-speed air With the movement of thethrottle valve to closed position, said tubular valve members beingprovided with eoacting ports adapted to form an auxiliary open inletpassage for low-speed air, when the main air-inlet passage and the inletpassage tor auxiliary high-speed air are closed.

2l. In a earbureter, the combination ofy a main casing, a pair et hollowcylindrical valve members mounted in the main casing and forming theWalls oit' a mixing chamber having a main air-inlet opening at its bottom portion and a mixture-outlet opening a t the upper portion of saidlchamber, said cylindrical valve members having adjacent peripheralauxiliary air-inlet ports inte-'r- :Een

opening formed by said ports, means for moving the inner cylindricalvalve member endwise for increasing and diminishing the area of saidports in a direction longitudinally of said valve members, and anannular aiige upon the lower end of and movf able upward and downwardwith the endwise movable cylindrical valve member, for increasing anddiminishing the area of the main air-inlet opening.

22. In a carbureter, the combination of a main casing, a pairvotl hollowcylindrical valve members mounted in the main casing and forming thewalls of a mixing chamber having a main air-inlet opening at its bottomportion and a mixture-outlet opening at the upper portion of saidchamber, said cylindrical valve members having adjacent peripheral portsintermediate the main airinlet opening'and the mixture-outlet openingand adapted to communicate with each other and with the mixing chamberformed by said cylindrical valve members, means for rotating the outerAcylindrical valve member to dili'erent adjusted positions, for changingthe area of .the auxiliary air in1et opening formed by said ports, meansfor moving the inner cylindrical valve member endwise for increasing anddiminishing the area of said ports in a direction longitudi- .nally ofsaid vvalve members, an annular iange upon the lower end of andrmovableupward and. downward with the endvvise movable cylindrical valve member,for increasing and diminishing the area of the main air-inlet opening, amanually operable throttle valve for controlling the mixtureoutletpassage,- and means t'or operativel connecting the throttle valve withthe ends wise movable cylindrical valve member.

Q3. Ina carbureter, the combination of a' main casing, a pair of tubularvalve mem-` bers mounted inthe main casing in concensa iture-outletvopenings at opposite ends of said valve members, one of said tubularvalve members being rotative with respect to the l,other and having anauxiliary air-inlet port 'adapted to 'communicate with the mixingchamber, for admitting auxiliary high-speed air, and the other of saidtubular valve mem- 'bers being movable eiidwise in one direction intopositionto close said auxiliary air-inlet port and in an oppositedirection to open said port, an auxiliary air-inlet passage leading intothe mixing chamber for admitting an auxiliary current of air forlowspeed operation, whenthe auxiliary inlet passage for high-speed airis closed, an annular flange upon the lower end of the endwise movablevalve member and movable with`the latter toward and from the lower openend of the rotative tubular valve member, for opening and closing themain airinlet opening, a throttle valve for openin and closing themixture-outlet opening, and manually operable mechanism connected withthe endwise movable tubular valve member and acting to move the latterendwise in one direction to open the main airinlet passage and theauxiliaryinlet passage for high-speed air, and close the auxiliary inletpassage for low-speed air with the movement of the throttle valve toopen position, and acting to move said endwise movable valve member inan opposite direction to close the main air-inlet passage and the.auxiliary inlet passage for high-s eed airl" and open the auxiliarypassage or lovvA speed air, with the movement of the throttlevalvetoward closed position.

In testimony that I claim the foregoing-as my invention I aiX mysignature, in the presence of two witnesses, this 27th day of January,A.. D. 1913.

WILLIAM OTTAWAY.

Witnesses:

F. E. SPERRY, C. H. GREENE.

